Hello everyone! I currently own a i30 CRDI 2013' and i'm having a bit of a problem.. 2 windows got scratched when i was lowering them.. I realised that tiny rocks got stuck in the rubbers outside, and when i lowered the windows, these rocks created a large lined scratch to them.. The thing is that every now and then i clean very good the car so the rubbers get clean.. I asked around and nobody knew what was the problem... Now i am scared to lower the windows when the car isn't clean.. Does everyone know something? Any advice? Can i fix the windows? What should i do with the rubber? Can i clean them well enough?